This particular addiction is at unprecedented levels, and across every social and economic strata. Have personally known a couple of kids my kids grew up with who are gone. Both seemed to be lost souls after college, and even with treatment, they relapsed. There were huge performance demands from the families, among other issues.
Imo, this is a very sad commentary on the state of society, when, even long after treating the physical pain, huge numbers of people are seeking out drugs to fill an emptiness within from which they feel there is no other escape.